Home / 5,721.40-8,565.90-5,138.20

Finding the Fourth Proportional to 5,721.40, 8,565.90 and 5,138.20

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Solution

The fourth proportional to 5,721.40, 8,565.90 and 5,138.20 is: 7,692.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,721.40 : 8,565.90 = 5,138.20 : x
  2. Step 2: Convert to fraction form
    5,721.40/8,565.90 = 5,138.20/x
  3. Step 3: Cross multiply
    5,721.40x = 8,565.90 × 5,138.20
  4. Step 4: Simplify right side
    5,721.40x = 44,013,307.38
  5. Step 5: Solve for x
    x = 44,013,307.38/5,721.40
  6. Step 6: Final answer
    x = 7,692.75

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.